How long it takes to cure fluid on the brain depends on the cause of the condition as well as its severity. If the fluid in the brain is due to a chronic, delayed subdural hemorrhage after a head trauma, the bleeding is not large, and after conservative treatment, a subdural fluid slowly develops, which will absorb part of itself, but will persist in some patients. Dehydration can be given through the drugs mannitol and furosemide, and recovery is possible in about a month. If the fluid buildup in the brain is due to an obstruction or other cause, medications can be used to lower the patient’s intracranial pressure, often with a mannitol IV drip or glyceryl fructose. When the fluid in the brain reaches a certain level that affects function, a shunt in the ventricles can be used to drain the excess fluid out of the abdominal cavity and reduce the damage that hydrocephalus causes to the brain tissue. It is important to take the treatment of hydrocephalus seriously, seek medical attention in a timely manner, and treat it aggressively under the guidance of a medical professional.